Vent lift



Jan. 6, 1942. P. R. HOLLAENDER VENT L-IFT Filed March 22, 1940 2Sheets-Sheet l /V/////////////llflt I VII/llIII/IIIIIIIII IIIIVIIl I IINVENTOR. BY 5 $2M WMKM ATTORNEYS Jan. 6, 1942. P. R. HOLLAENDER VENTLIFT Filed March 22, 1940 2 Sheets-Sheet 2 /lllllllllllllllllllll/J7%W,"

INVENTOR.

WMWMZATTORNEYS Patented Jan. 6, 1942 UNITED STATES PATENT OFFICEVENT/:LIFT I Peter R. Hollaender, Cincinnati, Ohio Application March 22,1940, Serial No. 325,456

, 9 Claims. 1. 285-31) This invention is directed to vent pipes of thetype adapted to [discharge obnoxious gases through the roofs ofbuildings. More specifically, the invention concerns the provision of awatertight seal at the area where the pipe passes through the roof, anda vent pipe which is constructed and arranged to make the provision ofsuch seal very easy and convenient.

The vent or lift fittings to which the invention is directed are thosecommonly used in building construction for the purpose of extending adischarge pipe above the roof line, as required by law in mostmunicipalities. In the usual'con-- struction, a pipe leads from thesource of exhaust or plumbing system to be vented, for instance, a bathsoil stack or an appliance discharging fumes, to some point just belowthe roof line, and an extension fitting is mounted upon thispipe toproject through the roof to discharge the gases at some pointsubstantially above it, for instance, one or two feet.

It is necessary that there be a water-tight seal at the juncture wherethe extension passes through the roof, in order that rain water ormelting snow be prevented from leaking through the roof and causingrotting of the timbers or damage to the plaster below. 'Heretofore ithas been conventional to surround the vent pipe with lead flashing andthe like for this purpose. The flashing usually extends under theroofing material and is calked tightly about the pipe, in someinstances, roof cement also being used'so as to make the joint aswaterproof as possible. However, through exposure of the joint to heatand cold. the expansion and contraction which takes place eventuallycauses a fracture or separation of the joint and the seepage of waterthrough it is permitted, which usually results in damage to plasteredceilings below. Moreover, it is a tedious job to calk a' lead gasket ora poured joint and the installation, particularly on sloping roofs, is arelatively expensive one.

The primary object of the invention has been to provide an inexpensivevent fitting which is constructed and arranged to simplify theseinstallation requirements, and to provide a watertight seal at theaperture in the roof through which the vent extends.

A further object of the invention is to provide, a vent fitting whichcan be used on roofs of various pitches, as well as on flat roofs.

, Other objects of the invention, and the advantages of the structure,are disclosed in the followingdescriptionof the drawings, in whichpreferred embodiments of. the invention areil-. lustrated.

In the drawings:

Figure 1 is a cross-sectional view through a vent fitting constructed inaccordance with the invention.

Figure 2 is a perspective view showing the appearance of the fittingwhen installed upon a roof. I

Figure 3 is a cross-sectional view of a modifie type of fitting.

Figure 4 is a perspective type of fitting.

In the preferred embodiment, the device is comprised of one or moresections which normally resid below the roof and one or more sectionswhich extend above the roof. tions may be mad of cast iron or othermetal view ofthe modified or ceramic ware, and may, conveniently, be

termed the lower and the upper sections respectively. I

The lower end of the lower section which may be called an adapter isconstructed to receive, or be received by, the vent pipe, and the upperend of it terminates in a bell mouth. The upper or lift section, inturn, is provided with an annularlip or flange which is constructed tocooperate with the bell mouth of the lower part to ting by screwing theupper and lower sections together.

The lower section of the fitting may be in two parts, if desirable,these joining one another obliquely to the axis of the unit. Otherwiseexpressed, a collar fittingmay be clamped between the annular flange ofthe upper section and the adapter fitting so as to provide two joints,either of which is suitable for receiving the flashing; one of thesejoints is normal to the axis ofthe These secmolding of the flashing tothe contour of the roof is therefore avoided. It is desirable that thejoint which is normal to the axis of the fitting be uppermost, thoughthis is not necessary. It will be understood, however, that it isdesirable to mount the fitting relative to the roof line, so that thatjoint which is to be used is either on a line with, or adjacent to, theplane of the roof. It is usually also desirable that a gasket beinstalled in the juncture which is not used to receive flashing, inorder that the escape of gases be prevented except at he discharge mouthof the vent.

The extension unit which is illustrated in Figure 1 is of a simplifiedtype adapted for flat roofs or those with relatively slight pitch. Thelower section of this type of fitting is indicated generally at I(Figure 1) and comprises a cylindrical member terminating at its lowerend in a hub 2 which is adapted to be connected to the soil pipe. If thevent line is of relatively small diameter, the hub 2 may be threaded, asshown, for convenience in connecting it to the pipe;.if the vent line beof relatively large diameter, the hub may be of bell or spigot or otherformation, depending upon the nature of the vent line at which it is tobe connected. The lower section I is of enlarged diameter above the hub,as shown at 3 in the drawings; its internal diameter may be appreciablygreater than that of the preceding vent pipe, for preventing frostaccumulation at the exposed portions from choking the outlet.

The upper end of the lower section terminates in a bell mouth, indicatedgenerally at 4. This portion, more specifically, comprises an annularseatfi which preferably is chamfered, and a lipportion 6 surrounding theseat and extending above it. The edge of the lip is preferably ofrounded formation and free of sharp edges, so that the typical lead orcopper sheathing may be peened around the lip and downwardly within it,without being cut or torn by the edge.

At a portion of the lower section I intermediate the bell mouth and thelower hub, the internal surface of the lower section contains threads'8. These preferably are cast or formed into the section at the timethat it is made and are of relatively slight pitch. By rotating the onesection relative to the other, parts are screwed together and pressureis applied upon the flashing Which is received between the membersforming the joint, so that a waterproof connection is provided.

The upper section of the fitting, that is, the portion which extendsgenerally above the roof line, is indicated at 8 and comprises a tubularvent portion 9 and a shank H). The shank fits telescopically down withinthe lower section and is provided with threads II for engagement withthe threads I.

A lip l2, providing an annular flange and a recess l3, extends from theexterior of the upper section 8 at some point along its length relativeto the threads on the shank ID, for engagement with the lip 6 of thelower section. It is preferable that the portion of the upper sectionbeneath the recess be configurated to complement the seat of the lowersection, in order that the two fit together relatively snugly. Thus, byrotating the upper section relative to the lower one, it will be seenthat the hp 6 is caused tobe seated within the recess l3.

In utilizing the fitting on a construction job, the lower section isfirst installed upon the vent pipe, then a hole of diameter smaller thanthe diameter of the lip 6 is cut centrally in a sheet of flashing, forinstance, a piece of sheet lead about 18" square overall, so that theflashing can surround the bell mouth of the lower section and rest uponthe roof. Then, with a hammer, the marginal portion of the flashingsurrounding the hole is piened down into the bell mouth and, finally,the upper part of the fitting is inserted into the lower section andscrewed down until the lip 6 compresses the flashing against the lip l3in sealing relationship. The flashing surrounding the vent may beattached to the roof sheeting to reside eventually under the roofingmaterial proper, when it is applied.

There are several features of considerable practical importance whichreside in the present construction.

It is not necessary to use molten lead nor calk the flashing joint, andno tools except a knife and a hammer are required to complete theinstallation. More important, however, all apertures, through whichwater might seep, drain into the vent line so that any leakage whichdoes occur can cause no damage.

The shank portion ill of the fitting serves the purpose of providingmeans for connecting the upper and lower parts, so that the lip 6resides within the recess [3 in clamping relationship, and of preventingthe extention of the vent above the roof from coming loose and fallingfrom its position.

The fitting which is disclosed in Figure l is adapted particularly foruse on flat roofs or those of slight pitch, but may also be used onroofs of substantial pitch by bending the sheathing surrounding thefitting to complement the pitch of the roof.

Figure 3, on the other hand, illustrates a universal device adapted tobe used on flat or pitched roofs, as the case may be, withoutsubstantial bending or forming of the sheathing to the roofs slope. Inthis structure, the lower section is comprised of twomembers [4 and [5.The collar section, l5, terminates at its one end in a similar bellmouth which, however, is disposed in a plane oblique to the axis of thefitting; for instance, at an angle corresponding approximately to thepitch of the roof upon which it is to. be used. The lowermost section ofthe assembly is provided with the threads I for engagement with thethreads ll upon the shank of the extension member, and the intermediatesection [5 is therefore clamped between the upper and lower members whenthey are screwed together at the time the fitting is installed. A gasketI6 is installed in the bell and spigot not in use.

If the extension is to project through a flat roof, the sheathing isconnected to the fitting within the upper bell mouth, as at A; while ifthe roof is of substantial pitch, the sheathing is inserted into theoblique bell mouth, as at B. The oblique bell mouth may reside at anangle of approximately 30 to the normal to accommodate a range of roofpitches from approximately 15 to 45. A variety of sections of differentangles may be made if desirable, though the sections shown willaccommodate most roof pitches.

While the fitting has been disclosed particularly in relation to ventlifts used in the construction of residences, it may be used forindustrial purposes in the venting of fumes or vapors.

Having described my invention, I claim:

1. A vent fitting which comprises a tubular lift having an annular lipextending from its periphery, a connector fitting adapted telescopicallyto receive a portion of the tubular lift beyond the lip, thread meansprovided upon the telescoping portions for screwing them together, acollar fitting extending telescopically around the tubular liftintermediate its lip and the connector, and joint means adapted for thereception of flashing material between the collar and the lip at its oneend, and alternately between the collar and the connector at its otherend.

2. A vent fitting which comprises a tubular lift having an annular lipextending from its periphery, a connector fitting adapted telescopicallyto receive a portion of the tubular lift beyond the lip, thread meansprovided upon the telescoping portions for screwing them together, acollar fitting extending telescopically around the tubular lift,intermediate the lip and the connector, and joint means adapted for thereception of flashing material formedbetween the lip and the collar, atits one end, and between the connector and the collar, at its other end,one of said joints extending about the tubular lift in an axis which issubstantially normal to the axis of the lift, and the other jointextending about the tubular lift in a plane which is oblique to the axisof the tubular lift.

3. A vent fitting which comprises a tubular lift having an annular lipextending from its external periphery intermediate its length, aconnector fitting telescopically positioned over a portion of thetubular lift below the lip, a collar fitting positioned intermediate theconnector fitting and the lip, cooperating threads carried by theconnector fitting and the telescoping portion of the tubular lift forclamping the collar between the connector and the annular lip, thecollar forming with the annular lip a pressure connection which issubstantially normal to the axis of the tubular member, and forming withthe connector 2. pres sure connection which is oblique to the axis ofthe tubular member.

4. A vent fitting which comprises a tubular member having an annular lipextending from its periphery intermediate its length and defining ashank portion at its one side and an extension portion at the other, acollar, of lesser length than the shank portion and greater internaldiameter, fitting telescopically around the shank and having a rimcooperating with the lip to form a pressure joint suited for thereception of flashing material therein, and a connector membertelescopically fitting around the shank portion, the portion of theshank extending beyond the collar being threadedly connected to theshank and forming another joint suited for the reception of flashingmaterial therein, one of the joints being substantially normal to theaxis of the fltting and the other being oblique to the axis of thefitting.

5. A vent fitting of the type described, comprising telescopicallyinterfitting tubular sections which are adapted to be screwed together,means providing an annular pressure joint between the two sections, andmeans adapted for the reception of flashing material therein.

6. A vent fitting of the type described, comprising telescopicallyinterfitting tubular sections whichare adapted to be screwed together,and means providing a pair of annular pressure joints between the twosections, which joints are adapted alternatively for the reception offlashingmaterial therein, one of the joints being normal to the axis ofthe tubular sections and suited for the reception of flashing extendingfrom a flat roof, and'the other of the joints being oblique to the axisof the tubular members and suited for the reception of flashingextending from a pitched roof.

'7. A vent pipe construction, comprising a lower section and an uppersection telescopically engaged in the lower section, said upper sectionincluding an annular lip, flashing having the margin of its openingadapted to be clamped between the upper'end of the lower section and thelip of the upper section, the lip of said upper section overhanging thesecured margin of the flashing and forming a deflector adapted to directrain outwardly away from the joint, and component means on therespective sections adapted to secure them together to clamp said marginof the flashing between the upper end of the lower section and the lipof the upper section.

8. A vent pipe construction, comprising a lower section and an, uppersection telescopically engaged in the lower section, said upper sectionincluding an annular lip adapted to overhang the upper end of the lowersection, said lower section providing an annular recess adapted toreceive an inwardly downwardly turned margin of an opening in flashingadapted to be clamped between the upper end of the lower section and thelip of the upper section, the lip of said upper section overhanging thesecured margin of the flashing and forming a deflector adapted to directrain outwardly away from the joint, and component means on therespective sections adapted to secure them together to clamp theflashing between the upper end of the lower section and the lip of theupper section.

9. A vent pipe construction, comprising two sections, the upper sectionproviding an annular lip adapted to overhang the upper end of the lowersection, means for drawing the sections together, and a flashing havingthe margin of its openingsecured between the lip of the upper sectionand the upper end of the lower section,

said lip overhanging the margin and providing a water shed, saidflashing being draped downwardly from the lip to provide a further watershed.

7 PETER R. HOLLAENDER.

